在我國(guo)的(de)(de)鋼(gang)管(guan)制造標準中，有(you)結構(gou)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)和流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)之分。結構(gou)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)主要(yao)用(yong)(yong)(yong)(yong)于一般金屬結構(gou)如橋(qiao)、梁、鋼(gang)構(gou)架等，它(ta)只(zhi)要(yao)求保(bao)證強度與(yu)剛(gang)度，而對(dui)鋼(gang)管(guan)的(de)(de)嚴密性不作要(yao)求。流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)：主要(yao)用(yong)(yong)(yong)(yong)于帶有(you)壓(ya)力(li)的(de)(de)流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)，它(ta)除了要(yao)保(bao)證有(you)符合相(xiang)應要(yao)求的(de)(de)強度與(yu)剛(gang)度外，還要(yao)求保(bao)證密閉性，即在出廠前(qian)要(yao)求逐根進行水壓(ya)試驗(yan)。對(dui)壓(ya)力(li)管(guan)道來說，它(ta)輸(shu)(shu)送(song)(song)的(de)(de)介質常常是易燃(ran)、易爆(bao)、有(you)毒、有(you)溫度、有(you)壓(ya)力(li)的(de)(de)介質，故應選用(yong)(yong)(yong)(yong)流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)。在實際(ji)的(de)(de)工程設計、采(cai)購和施工中，發現有(you)用(yong)(yong)(yong)(yong)結構(gou)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)代替(ti)流(liu)體(ti)(ti)輸(shu)(shu)送(song)(song)用(yong)(yong)(yong)(yong)鋼(gang)管(guan)的(de)(de)現象，這是絕對(dui)禁(jin)止(zhi)的(de)(de)。

  結構用無縫鋼管GB/T 8162主要用于一般結構和機械結構。其代表材質（牌號）：碳素鋼20、45號鋼；合金鋼Q345、20Cr、40Cr、20CrMo、30-35CrMo、42CrMo等。結構用不銹(xiu)鋼無(wu)縫管(guan) GB/T 14975-2012 是遍及用于化工、石油、輕紡、醫療、食品、機械等工業的耐侵蝕管道和結構件及零件的不銹鋼制成的熱軋（擠、擴）和冷拔（軋）無縫管。